Simple patch to increase virtual block size of SMB filesytem in Linux
kernel. It improved tranfer rate of cp command almost
by a factor of 2 (approx. 700KB -> 1300KB or something
like about it) in the local conditions. Now cp should be as fast
as cat redirected across networked filesystems.

Unfortunately the blocksize causes different (4 times smaller) sizes
reported by du command as it measures it in blocks
and not in kilobytes as some people think.